What is Dollar
Dollar is a Finance currency which is (often represented by the dollar sign $) is the name of more than twenty currencies, including (ordered by population) those of the United States, Canada, Australia, Taiwan, Hong Kong, Singapore, Belize, New Zealand, Liberia, Jamaica and Namibia. ... Generally, one dollar is divided into one hundred cents and as per differnet country.
What is bitcoin
Bitcoin is a digital currency, created and held online. No one controls it. Bitcoin can not be printed, like dollars or Pound or Euros – they’re produced by people, and increasingly businesses, running computers all around the world, using software that solves mathematical problems.
It’s the first example of a growing category of currency known as crypto currency.